Power-transmitting device



Dec. 27, 1927. W. J. FRANCKE POWER TRANSMITTING DEVICE 4 Sheets-Shee t 1 I Original Filed Jan.l7. 1920 mllllll.

4 Sheets-Sheet 2 III W. J. FRANCKE POWER TRANSMITTING DEVICE Original Filed Jan.17. 1920 I ,az

fag 14 Dec. 27, 1927.

w. J. FRANCKE POWER TRANSMITTING DENIGJEI 4 Sheets-Sheet Original Filed Jan.l7. 1920 Re. 16,829 W. J. FRANCKE I TOWER TRANSMITTING DEVICE Original Filed Jan.1'7. 1920 4 sheetssheet 4 Dec. 27, 1927.

.ings forming a Reissued I Dec. 27, 1927.

UNITED STATES Re. 16,829 PATENT OFFICE. I

WILLIAM J. rimncxn, on NEW BRuNswIoK.Nnw JERSEY. ASSIGNOR, BY MESNE AS- SIGNMENTS, TO some WALDRON CORPORATION, on NEW mwnswron, NEW JER- SEY, A CORPORATION NEW JERSEY.

POWER-TRANSMITTING DEVICE.

Original No. 1,398,773, dated November 29, 1921, Serial No. 352,175, filed January 17, 1920. Application for reissue filed November 28, 1923.

The ob'ect of theinvent-ion is to provide a. now. an improved power transmitting device more especially designed for transmit ting power by angularly disposed shafts.

Another object is to compensate for the non-circular path and the irregular angular advance of one coupling member relative to the other coupling member to insure a continuous regular driving of the driven transmission shaft from a uniformly driven driving or motor shaft.

With these and other objects in view, the invention consists of certain novel features of construction as hereinafter shown and described and thenspecifically pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawart of this specification, in

fiaracters of reference indiwhich similar 0 cate corresponding parts in all the views.

Figure 1 is a longitudinal central section of the power transmitting device;

Fig. 2 is a sectional plan View of part of the same on the line 22 of Fig. 1;

Fig. 3 is a transverse sect-ion. of the same on the line 33 of Fig. 1;

Fig.4 is a diagrammatic view of the power transmitting device;

Fig. 5 is a longitudinal central section of a modified form of the power transmitting device on the line -5-5 of Fig. 6;

Fig. 6 is a cross section of the same on the line 6-6 of Fig. 5;

Fig. 7 is a sectional side elevation of a' portion of the same on the line 77 of Fig 6;

Fig. 8 is a reduced face view of one of the coupling disks of the ball and socket joint; and v Fig. 9 is a diagrammatic viewof the power transmitting device illustrated in Figs. 5. '6, 7 and 8.

When connecting two angularly disposed shafts by a ball and socket joint or other universal coupling, one of the joint'members travels in a non-circular path relative 'to the other joint member, and'an irregular angular advance takes an irregular transmission of power and a loss ,of power. With the improvements lace in. one joint" member relative to the ot er thus producing Serial No. 677,518.

presently described in detail, the above mentioned defects are compensated for to insure a continuous regular driving of the driven transmission shaft from a uniformly driven 0 driving or motor shaft.

.- keys 14 to the motor or driving shaft 10 and the socket 15 has its hub 16 slidingly connected with the polygonal end 17 of the driven shaft 11. A nut 19 screws on the reduced threaded inner end 20 of the motor shaft 10 and abuts against a shoulder 21 formed on the ball 13 to hold thelatter against accidental longitudinal movement on the motor or driving shaft 10.

The ball and socket members 13 and 15 of the universal joint 12 are connected with each other by-a flexible coupling to com-. pensate forthe non-circular path and the irregular angular advance of one coupling member relative to the other. This flexible coupling is arranged as follows; In the ball 13 of the universal joint 12 are held the inner ends of radially disposed bunches of flexible shims 25 having their outer or free ends extending into openings 26 formed in slides 27 :mounted to slide sidewise in pivots 28 mounted to turn in the socket 15 'with the axes of the pivots 28 disposed radially and hence at a right angle to the line of movement of the slides 27 in the said pivots. The side walls of the slides 27 are made convex,as plainly shown in Fig. 1, and the outer ends of the bunches of shims 25 have their corners rounded ofito 'permit'of an easy sliding movement of the slides 27 relative to the outer ends of the bunches of shims 25. From the foregoing it will be seen that by the arrangementdescribed the joint members 13 and 15 of the universal coupling are movable one relative to the members constituting the flexible coupling .employed for connecting the ball 13 with the socket 15..

In order to protect the power transmitting device from dust and other extraneous matter use is 'made of a spherical hood, formed of two parts 40 and 41, of whichthe part 40 is secured to the motor casing 42 while the other part 41 is preferably attached to a sleeve 43 held on the hub 16 of the socket member 15. By reference to the'diagram:

tive to the other, and hence the driven shaft 11 receives acontinuous regular, uniform driving from the motor or driving shaft 10. The explanation of this is as follows, special reference being bad to Fig. 4: The vertical Y line :v-m represents the plane in which the i hence these forces balance each other.

driving shaft 10 revolves, and the line y y .at an angle to and intersecting the line mw at the center W represents the plane in which the driven shaft 11 revolves, and it will be noticed that relative to the plane .aia,' the periphery of the plane 'yy describes an ellipse. The value of the depression of the circle to form the ellipse is indicated atZ. It will be noted that the elliptical travel of the'driven shaft ll-forces the slides 27 (shown in full lines in Fig. 4) to take the position shown by the broken lines and which position they'can only assume on bending of the shims, and the amount of bending or deflection is shown by the full line A drawn from B as the center. The shims in the two points below the center line at degrees bend the same amount but in an opposite direction. When the shims 25 are in the position N (north), S (south), E east) and W (west) then the remain unc anged by the angularity of t e shafts 10 and 11, owing to the sl ding action of the shims at the points N and S and the turning of the slides 27 at the points W and E. The bend in the shims 25 at the points NW and SE tends to move the socket member 12 forward in the direction of drive with relation to the ball member 13, and the bends in the shims 25 at the points SW and NE tend to move the socket member 12 backward a lnId o angular change of 'rotative position of one coupling member 13 relative to the other member 15 is caused by the a'ngularity ofthe shafts 10 and 11 nor by theellipse caused by the angularity. When the ball member 13 movesin the direction of the arrow to drive the socket member 15 then the shims 25 at the points N, S, E and W bend,as shown by the broken line H, and the slides 27 turn to adapt themselves correspondingly, as shown by the broken'line I. The shims 25 at the points NW and SE bend, as shown by the I broken line J, and the slides 27 turn to adapt themselves correspondingly, as indicated by the broken line I. The shims 25 at the points NW and SE bend, as shown by the broken line J, but'the amount of the bend is double that at the points N, S, E and WV because the shims 25 are clearly bent by the angularity of the shaft, and thedriving power is also doubled at these two points. The bend of the shims 25 shown by the line A' at the oints NE and SW straightens out and the riving comes neutral.

The change in angular advance caused by the elliptical travel of the periphery of the coupling member 13 relative to the other coupling member 15 is compensated for at points N and S by sliding one of the shims 25, at points E and W by the turning of the slides 27 and at the four points NW, NE, SE and SW by the bendin of the shims 25, it being understood that t e bending above the center of the coupling is in an opposite direction to the bending below thecenter,

the two forces balancing each other, thereby causing no change in the angular advance.

WVith aj'constant load the two coupling members 13 .and 15 have a uniform angularadvance and with a variable load .the nonone joint member relative to the other. The

universal joint 52 is in the form of a ball and socket joint arranged as follows On' the adjacent ends of the shafts and 51 are secured hubs 60, 61 of spherical or ball members 62, 63 having outwardly extending flanges 64, 65 to which are fastened the flanges 66, 67 of disks 68, 69 by the use ofv bolts 70 or other fastening means. In the flanges 64, 66 are mountedto turn radially.

uniformity of the angular advance is limited vdisposed pivots 75 and similar pivots 76 are mounted to turn in the flanges 65, 67, and these pivots 75, 76 are arranged in oppositely disposed pairs and are provided with-side- 'wise extending openi'ngs 77, 78 through which 'extendsa flexible connecting member .80 in the'form of a bunch of shims, as plainly shown in Figs. 5 and 7. The outer ends of each flexible connecting member 80 extend into openings 85, 86 formed in flanges 87, 88 extending outwardly from socket members 89, 9O fitting on the spherical or ball members 62, 63. The flanges 87, 88 of the socket members 89,90 are provided with rims 91, 92

arran ed in abutting relation and held in- From the foregoing it willbe. seen that by the arrangement described the flexible connecting members 80 flexibly connect the ball."

members 62, 63 with the socket members 89, 90 thus compensating for the non-circular path of one point member relative to the other and likewise .for the irregular angular advance of one joint member relative to the other. The explanation of this is as follows,

. special reference being hadto Fig. 9:

At the points a, a. and e, e the shims 80 are straight, and not bent, due to the angle of the shafts and 51,because the shims 80- are held at each end in the housing formed by the socket members 89 and 90 and the flanges 64, 66 and 65, 67 are close to the housin and hence the shims are not liable to bend. Both the housing and the two flanges turn onthe center f due to the ball and socket construction, and this forces the shims 80 at the points 6, b, a, '0, d, aZ to bend in the directions shown. The periphery of the flanges 65, 67 describes the circle g. With reference to the flanges 65, 67 the-flanges 64, 66 describe the ellipse h. While the point e moves to d, the point 6 moves to a where the shims are straight and hence the angular advance for the distance traveled is uniform, but while the point e moved to d on the line w, the point e moved only to d on the dotted line of the ellipse h with the shims 80 connecting at points (Z, d, bending to compensate for the shorter line of the elhpse with the an lar advance remaining ,constant. In a ike manner, the shims 80 connecting the points 0, o and b, b bend to compensate for the shorter peripheral travel, and during the second half of the revolution bend for the longer peripheral travel. In the diagram-the bend of the shims at b, 1; appears greater than it is, due to being projectbend of this bunch of shims 80 is shown in the rojection at the top of the diagram.

a'ving thus described my invention, 1

claim as new and desire to secure by Letters Patent: r

1. A power transmitting device, comprising a universal joint having joint members movable one upon the other on a common center, a flexible coupling member carried by one of the joint members, and pivotally mounted means carried by the other joint ing its inner ,en

member and connected with the flexible member so as to bend the latter.

2. A power transmitting device, comprising a driving shaft, a driven shaft at am angle to the driving shaft, a ball and socket joint connecting the adjacent ends of the said shafts, a flexible member carried by one of the parts of the said joint, pivotally mounted means carried by the other part of the joint, and means for connecting the pivotally mounted means with the flexible member so as to bend the latter.

3. A power transmitting device, compris ing a universal joint having joint. members movable one on the other on a common center, a radially disposed flexible coupling member secured at one end in one of the joint members, a slide engaged by the free end of the said flexible coupling member, and a pivot mounted to turn in the other joint member and in which the said slide is movably mounted.

4. A power transmitting device, comprising a universal joint having joint members movable one on the other on a common center, a radially disposed flexible cou ling member secured at one-end in one o the joint members, a slide engaged byv the free end of the said coupling member, and a pivot mounted to turn in the other joint member and in which the said slide is movably mounted, the-said pivot having 'itsaxis disposed radially and at a right angle to the movement of the said slide in the pivot.

5. A power transmitting device, comprising a. driving shaft, a driven shaft at an.

angle to the said driving shaft, a ball and socket joint connecting the adjacent ends of the said shafts with each other, a flexible coupling member disposedradially' and having its inner end secured in the ball of the coupling member.

6. A ower transmitting device, comprising a riving shaft, a driven shaft at an an le to the said driving shaft, a ball and soc et joint connecting the adjacent ends of the said shafts with each other, a flexible ed from the 45 angle position. The true coupling member disposed radially and l1avsecured in the ball of the saidjoint, a pivot mounted to turn in the said socket member of the joint and having its axis disposed radially, and aslide mounted to slide in the said pivot at an angle to the axis thereo ,.the said slide having an opening therethrough and the outer end of the flexible coupling member slidingly extending through the said slide opening.

7 A device for transmitting power from one rotary member to another comprising a flexible coupling element operatively connecting said members and having a pivotal connection .with at least one of said members, and means providing for movement of said element axially of the member in which it has pivotal movement.

v8. A device for transmitting power from one rotary member to another comprising a flexible coupling element operatively connecting said members, and acylindrical bearing element pivotally mounted in one of said members parallel to the axis thereofand axially movable in% said member and adapted to'engage the said coupling element. 9. A device for transmitting power from .one rotary member to another comprising a flexible coupling element operatively connecting said members a part pivotally mounted in one of said members on an axis at right angles to the axis of said member, and a second part having connection with said flexible element and adapted for rotary movement in said first part on an axis perpendicular to the'pivotal axis of said art.

10. A device for transmitting power rom one rotary member to another comprising a flexible coupling element operatively connecting said members, a part pivotally mounted in one of said members on an axis .eratively connecting sai at right angles to the axis of-saidmember, and a second part pivotally mounted in the first part on an axis at right angles to the axis of the first. part and movable axially in said first part, and means for connecting said second part with the flexible element.

11. A. device for transmitting power from one member to another comprising a plu rality of flexible radial coupling elements operatively connecting said members and having eacha' pivotal and slidable connection with atleast one of said members, the

.said connection roviding -for pivotal movement between t e last-named member and the flexible elements on axes parallel to the axis of said member and relative sliding WILLIAM J. FRANCKE. 

